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EXHIBIT A1 <br />City of Everett – Replacement of Reservoir 3 <br />Contract Amendment No 1 4 Scope of Services <br />Client Responsibilities <br />1. Continuation of original scope of work. <br />Assumptions <br />1. A 30% design submittal or review workshop will not be required for the new single 8 MG <br />ground storage reservoir. <br />2. Construction access into and out of the site will be limited to the existing entrance off of <br />Evergreen Way. <br />3. Stormwater memorandum to be based on Department of Ecology (DOE) requirements <br />for new development. <br />4. Participate in two (2) virtual meetings with the City to discuss PFAS data interpretations <br />and soil disposition. <br />Deliverables <br />1. Continuation of original scope of work based on one 8 MG ground storage reservoir <br />including plans and specifications related to additional work items. <br />2. Revised Stormwater TM (PDF format) <br />3. Draft and final report of PFAS Analysis Technical Memorandum (TM) in PDF format. <br />Task 700 – Design Support Services <br />Task Objective <br />The purpose of these subtasks is to provide design support services that assist in the <br />development of the contract documents of both Phase 1 and Phase 2 design and construction <br />contracts. <br />Subtask 700.5 – Geotechnical (HWA GeoSciences) <br />Consultant Services <br />1. Develop an additional Subsurface Exploration Work Plan memoranda for two (2) <br />additional geotechnical soil borings at the new single 8 MG ground storage reservoir <br />location. The work plan will detail the type, location, and extent (depth, sampling interval, <br />in-situ testing, and instrumentation installation) of proposed field explorations along with <br />logistics necessary to perform the work such as traffic control plans and staging areas. <br />2. Additional Field Explorations were performed on the site as follows: <br />Two borings to a depth of 50 feet and three borings to depths of 20 feet. A monitoring <br />well was installed in one of the 50 foot borings however this monitoring was never <br />utilized due to the presence of PFAS in the soils. <br />Borings were advanced with a hollow-stem auger, trailer-mounted drill rig operated by an <br />independent firm working under subcontract. Throughout the drilling operation, soil <br />samples were be obtained at 2.5-foot intervals to 20 feet below ground surface and at 5- <br />foot intervals thereafter by the Standard Penetration Test (SPT) procedure (ASTM:D- <br />1586) or similar method. The samples at 5-, 10-, and 15- feet were sampled using a 3- <br />inch outside diameter Modified California Sampler (CAL) to obtain samples for